Universal joint.



P. A. MERTBN.

UNIVERSAL JOINT.

APPLIOATIOI mum 12.20.1910.

Patented Aug. 8, 1911 "'1 TN [383 ES A 'I'TOILVE Y1 BEST AVAILABLE COPY UNITED STATES PATENT OFF CE.

PAUL .weusm MER'IEN, or wnsmcmrrn, gonommo.

UNIVERSAL JOINT.

Specification Letters Patent.

BES AVA Patented Aug. 8, 1911.

Application filed April 20, 1910. Serial No. 556,527.

To all whom it may concern.-

lie. itknown that- T'. PAUL A. mm; a

t-itizen of the United States, residing at \\'estelifle. in the county of (.uster undi ll'nit-ersnl Joints; and I do declare the following to be at full. elem. nnd exnet description of the Invention. sueh :\s W! ennble others skilled .in the art to which it nppettnius to make and use the snme. referent-e leing had to the net-ompnu \'ing drnwings. and to the letters and ligtttes of reference nmrlted thereon, whit-h form :t port of this speeiticntion.

.\l invention relates to improvenu-nts in universal joints ttlttl purtieulnrl rto n device of thit-hnrntrter for use in grinding mills, 'llltflt t'tttluult' n rertienllv suspended, gyroiory roll-shalt.

'l'be objeetot' the present invention is. brietly, to provide a universal ioint thnt slmll e largely free of eertnin faults attending the opt-ration of melt nithnnisms in pit-sent u e. .\lltt lt it-h faults are. rapid wearing out of ertnin portal nud frequent brenltng t' rtnin bolts. the rent-uni of whi h part- '--.'nlers the mill idle. fut: con iderable time. ill-- nuiringz mneh lnbnr for uniting th ln m-t-ompl shing: this tllli 'll l lure '-l'lt'tl the improved details n t'nltslrttt' lll'll tn-reinnl'u-r dest-ribed. tttl'l illustrnted in portion ti is integral with a downward extension 7, which is snpportedby rings 8 and by :tuuulnr members i 10, Supported by the frame I. The eonstruet'ion lust mentioned is not elnimed as nov l. therefore does not require speeilie deseription.

linlted upon the member i. is n cup member t2, the central pnrt of wbieh is jourmiletl on the. shaft 3. The manner in which said eat) is :tttnehed to the member t' is one of the features of this invention.- in some. strttetitres in present use. the cap member 12 is held in place by stud-bolts, tapped into the underlying member 1'. 'lhese stud-bolts frequently brettk or shear at or near the joint between the parts united. The machine in sttt'lt eases must be stopped, the en removed, the embedded parts of the bolts t rilled out, the holes re-tupped, and new bolts inserted. By my impro'red construction, should the bolts be broken by excessive stress, they may be renewed in a few minutes, and without. disturbing any part of the mer-hunism. To this end the members ti and ii. are formed with tttllttllul' llnugt-s 3 and 12' respectively, and said tlnnges :tre formed with etpmlly spurt-d. registering note -ies i i and upt-rtures 13' adapted to rem-ire tolls ll lt'ei'el'ubtv these bolts ure thrt'nded on both ends. and

two nuts are plneed on eueh end, as shown.

the outer tu|ts lu-in;, hwtz-nuts. lrdiuury set-lion.

.\lott||;td tightly up n the tapered end of het'-pet-tive iew of tl'nusmittin': n ember.

:t--vtnllle|it t-HI of the gill plnte il -In Led. Fig. \'l s -t it t n'h d set'titutttl \'h'\\' of the ||l'l"--llt riw'. t en m- :i planat it right nnple to that Ill t 1:: l

lt' l-u'itu: more in tlt'luil to the p;|:'l-: -l |q-- -,;|l". .o purl Hi the rigid l't'utmof til nltetn-nl initll: .5. n lt 'u lu-l serttretl thereto uli i -tlpp-t'tittg n ret'tirul stol- #ltttfl i: I. the 'lt' --n puller 'llll'll reel\t'- motion from u |..-u (nut shown m d .l the upper portion of the l'nll- ':l|'l' \'lllt! slmll. l gt'ul ub nu enlnrged hub portion withll'utmtultllll}! member (Fi z. l\-'),.-t-t-nredon h ft presently de erilu-tl. h'nid hub purnlh-l vertieul sides It nnd ronvex ends.

l9". l ltt' ittllet' l'ut-es ol' snitl bloelts ut'e eonem'ed to lit the sllli'nt'e of the bull l5. us

shown in Fig! IV.

The pulley l is in- I ;ol' the pulley i-= transmitted to th trunni ns Ht whi -h l? I lnrge l't' I'F'F l'tu'the reeeptmn ul' ulul them-e to the roll shntt 5. The reeesses l'tu' hllltl gill blot'lts tlt't' t-ut of greater wulth tlmlt that of the blot-ks, to provide spat-es tLABLE COPY for ib-plates 20, which are shown in se'ction in l ig. II. For holding these plates in position, the. recesses are provided with dovetail groove and the gib-plates are shaped to fit into said grooves. All the gib plates, four in number, are set in the hub member (3. and extend t to the dividing line between hat mem an and the cap 12. The outer end of each gib plate is formed with a flange 20', having, a straight outer surface and a curved. concave inner surface 21. which fits upon the convex surface 19" of the contacting gib-block 19. The. tlat inner face 22 of the gib plates contacts the lateral face 19' of the gih block. All of said 00- engaging faces of the plates and blocks are to be 'uiaehine finished and case hardened, in order to resist the heavy wear to which thesesurfaees will be subjected. 'hen the parts have. worn sutliciently to create looseness therebetween, the gib plates may be removed and new ones substituted. In certain similar mechanisms in present use, comprising parts like 19 mounted in a recessed hub, half-gibs are used; but the sides of the.

gib-hloelcs wear off, lost. motion results, and when an unusually heavy shock occurs, durin; operation, some part is broken. The gib-plates herein shown are better balanced and wear for a much longer time than said half-gibs. The lower part of the hub member tis formed with an annular concave bearing surface, at 24, which supports the ball 15.

As shown, the cap member 12 is recessed below, and fitted loose-l3 within said recess is a pressure ring 25, having an annular concave face at. 26, bearing upon the part 15, and having a recess for clearance of the nut head 16. Said part 25 is also formed with a seat for a. Hat spiral spring 27,and with its upper surface inclined downwardly toward the central opening therein. The sprin 27 is compressed between members 25 and 12 An oil hole 28 is drilled through the stub shaft, 3 lengthwise. The opening through the pressure-ring 25 permits the oil to flow over the ball 15, and its trunnions, thereby lubricating all relatively moving bearing surfaces. The pressure ring extends down to approximately the center of the ball 15- -15 and is formed with suitable recesses to permit the vertical oscillation of the gib blocks 19.

In operation, when the roll shaft is forced upward, the u ward pressure will be vieldingly resisted y the spring 27, and violent blows of one art upon another, (which sometimes resul t in breakage) will be prevented.

As is well known in the art, the roll-shaft 5 will gyrate when in operation. This movement causes the trunnions 18 to oscillate, both upon their own axis and in vertical planes. which last described movement causes the faces 19' and it)" of gib-bloeks 19 to slide upon the gib plates 20. The ball 1515', being spherical, has universal movement between members T and Having thus described my invention, what I claim as new therein and desire to secure by Letters-Patent is:-

i. In a universal jointthe combination with a shafthaving a tapering end portion. having a threaded extension. of a ball made in two sections divided upon a plan v passing above the center of the ball: the larger section having a tapering bore. and mounted on the tapering part of the shaft. the smaller section having a threaded hole and mounted on the threaded ext nsion. and a key between said smaller section and said large section substantially as specified.

2. The combination of a ball divided into major and minor segments, a shaft rigidly mounted in said major segment, and having a threaded extension for carrying said minor segment, and a key between said major and minor segments substantially as specified.

3. In a universal joint, the combination of a ball divided into major and minor segments, said major segment having laterally projecting trunnions, a casing, means in said casing for universally engaging said trunnions, and a shaft rigidly mounted in said major segment, substantially as and for the purpose set forth.

4. In-a universal 'oint, the combination with a ball divided into major and minor segments, of a casing having an annular concave seat for said major segment, and a means for universally connecting said casing to said major segment, for the purpose specified. 4

5. In a universal 3 int, the combination of a casing having a rigid annular concave seat and a vieldable annular concave seat. of a ball divided into major and minor segments, a shaft connecting said major and minor i ments and adapted for projection bey id said casing, a key between said major and minor segments, and means for universally connecting said major segment to said casin substantially as spec-i fied.

In testin'iony whereof I atiix my signature in presence of two witnesses.

Witnesses 

